“Friend 2” is the sequel to “Friend,” which was released in 2001. “Friend 2” is about Joon Suk (played by Yoo Oh Sung) being released from his 17-year imprisonment and meeting his ex-best friend Dong Soo’s son, Sung Hoon (played by Kim Woo Bin), which brings up the past conflicts he had with his father, who died in the first film.